70007121617 has 4 divisors (see below), whose sum is σ = 70007825316. Its totient is φ = 70006417920.

The previous prime is 70007121601. The next prime is 70007121629. The reversal of 70007121617 is 71612170007.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 53612623936 + 16394497681 = 231544^2 + 128041^2 .

It is a cyclic number.

It is not a de Polignac number, because 70007121617 - 2⁴ = 70007121601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70007121017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171968 + ... + 411809.

It is an arithmetic number, because the mean of its divisors is an integer number (17501956329).

Almost surely, 2^70007121617 is an apocalyptic number.

It is an amenable number.

70007121617 is a deficient number, since it is larger than the sum of its proper divisors (703699).

70007121617 is a wasteful number, since it uses less digits than its factorization.

70007121617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703698.

The product of its (nonzero) digits is 4116, while the sum is 32.

The spelling of 70007121617 in words is "seventy billion, seven million, one hundred twenty-one thousand, six hundred seventeen".